Title: E(6) grand unified theory with three generations from heterotic string theory
Authors: Ito, Motoharu
Kuwakino, Shogo
Maekawa, Nobuhiro
Moriyama, Sanefumi
Takahashi, Keijiro
Takei, Kazuaki
Teraguchi, Shunsuke
Yamashita, Toshifumi
Department of Electrophysics
Issue Date: 19-May-2011
Abstract: We construct two more supersymmetric E(6) grand unified models with three generations within the framework of Z(12) asymmetric orbifold compactification of the heterotic string theory. Such an asymmetric orbifold is missing in the classification in the literature, which concludes that only one E(6) model is possible. In both of the new models, an adjoint Higgs field is obtained in virtue of the diagonal embedding method. This method mods out the three E(6) factors of an even self-dual momentum-lattice by a permutation symmetry. In order to realize the (E(6))(3) even self-dual lattice, we utilize the lattice engineering technique. Among the eight possible orbifold actions in our setup, two lead to new E(6) models. Though these models still share the unsatisfactory issues with the known one, our discovery raises hopes that excellent models that solve all the problems in the supersymmetric grand unified models will be found in this framework.
URI: http://dx.doi.org/10.1103/PhysRevD.83.091703
ISSN: 1550-7998
DOI: 10.1103/PhysRevD.83.091703
Volume: 83
Issue: 9
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Appears in Collections:Articles